Electric lock



(MgrtleL) w. R. MANIERRE & H. B. PORTER.

/ ELECTRIC LOOK.

No. 246,526. 7 Patented Aug. 30,1881.

Z 3- Y 4 V J" M M's 6%), L'III//// v fm/ezzlra I UNITED STATES PATENTOFFICE;

WILLIAM It. MANIERRE AND HENRY B. PORTER, OF CHICAGO, ILLINOIS.

ELECTRIC LOCK.

SPECIFICATION forming part of Letters Patent No. 246,525, dated August30, 1881.

Application filed May 23, 1881.

To all whom it may concern Be itknown that we, WILLIAM R. MANIERRE andHENRY B. PORTER, of Chicago, in the' county of Cook and State ofIllinois, haveinvented a new and Improved Electric Lock; and We dohereby declare that the following is afull, clear, and exact descriptionof the same, reference being had to the accompanying drawings, formingpart of this specification, in which-- Figure 1 is an inside view of themain shell with the inner plate removed. Fig.2 is an inside view of theinner plate, showing the parts which are carried by the same. Fig. 3 isa longitudinal section of the lock, taken through the lines y 3 and z zof the detached parts. Fig.4 is a transverse section of the lock, takenthrough the lines L -L and K Kof the detached parts. Fig. 5 is a detail.

The object of our invention is to provide an electrical attachment forlocks which will indicate at once the surreptitious opening of the lockby other means than the key. To this end our invention consists in apcculiar construction and arrangement of parts co-operatin g with theboltand-key mechanism, whereby the retraction of the bolt by the key hasno effect upon an electric circuit, while the retraction of the bolt byother means is made to break an electric circuit and sound an alarm uponan electric alarm mechanism or ann'unciator placed at any desireddistance from the lock. 1

In the drawings, X is the main shell of the lock-case, and Y is theplate which fits upon and closes in the open side of the shell. In themain shell X is carried the bolt G, which is projected by the tension oftwo parallel spiral springs, c 0, arranged upon opposite sides of thesame. In the plate Y (see Fig. 3) is formed the barrel B containing therotary cylinder or tumber shaft A slitted to re ceive the key, andhaving a cross-head, A, (see Fig. 2,) upon its inner end. By turning thecylinder A by means of ,the key the ends a a of the cross-head A aremade to bear against projections 12 b" of the bolt, (see Fig. 1,) andmeans are thus afforded for withdrawing the bolt.

We will now proceed to describe our improvements.

The outer or beveled end of the bolt we cut (ModcL) away on each side,leaving a high or full middle portion, J. On the plate Y is arranged athree-pronged piece, (3, made of some material which is a non-conductorof electricity. This piece is slotted and secured to the plate Y bymeans of a pin, 1, passing through said slot, so that said piece canboth slide bodily and turn upon the pin I like a pivot. Thisnonconducting piece is held on plate Y with one of its prongs betweenspring-contacts E, so that that prong shall be directly in line with thepart J. of the bolt whenever the plate Y is fastened to the shell. Thesespring-contacts E are secured to plate Y by insulated screws H H, andconnect, respectively, with wires D D, which pass with proper insulationthrough the metal plate Y and constitute the two terminals of a wirehavinga battery and electric alarm or annunciator in its circuit, whichbattery, circuit-wire, and electric alarm we have not shown, for thereason that any of the ordinary alarm-oircuits may be used, as will bewell understood by those familiar with this art. The other two prongs ofthe non-conducting piece 0 approach the cross-head A, and between themand said cross-head is interposed a spring, B, fastened to thecross-head or the shaft carrying the cross-head. This spring serves totransmit the pressure or influence of the cylinder or shaft to the piece0 in a yielding or elastic manner. Now, when the lock is opened in thelegitimate way by the rotation of cylinder A from the key one of thefaces a of the crosshead A bears against the corresponding face I) ofthe bolt to retract it, while the opposite end of spring B bears againstand turns the piece 0 about pin I as a pivot, as shown in dotted lines,thereby throwing the outer prong of the piece 0 to one side of the partJ of the-bolt, and allowing the bolt to be retracted withoutestablishing electrical connection between the two terminalcontact'springs E E of the circuit. The result is that when the lock isopened in this way no alarm is given. If, on the other hand, the bolt Gris retracted or pushed back in an irregular manner, as by a knife-bladeinserted at the crack of the door, or other opening, then the part J ofthe bolt pushes against the outer insulating-prong, C, and as soon asitpasses back far enough (which is permitted by the slot) then themetallic part J of the bolt passes between the two contactsprings E,establishing the circuit and sounds an alarm.

In order that the partOmay be permanently deflected to render the alarmattachment inoperative a bar, F, is jointed to one of the prongs and isallowed to project through the shell. This bar may be pushed in to throwthe outer prong, G, permanently out of range of the part J of the bolt,and when the bar is so adjusted it is held by its notch engaging withthe edge of the case. In this connection the spring B has also aseparate value, in that it permits the part 0 to be rigidly lockedwithout looking the cross-head A.

We do not confine our invention to any particular form of lock or keymechanism.

Having thus described our invention, what we claim as new is- 1. Thecombination, in a lock, of a pair of contact-springs, a piece ofnon-conducting material arranged between said springs to insulate them,a sliding bolt adapted to displace the insulating piece, and a keymechanism adapted to act upon both the bolt and thenon-conductinginsulator, as described, whereby the circuit is maintainedopen when the lock is opened by the key, and is closed when openedthrough other agency, as described.

2. The combination, with the bolt G, having elevated portions J, of thesliding threepronged insulator O, the terminal contactsprings E E,arranged upon opposite sides of the insulating piece, and the main shaftor cylinder, having a cross-head adapted to de fleet the three-prongedpiece, as described.

3. The combination, with the three-pronged insulating piece 0 and theshaft or cylinder having cross-head A, of the spring B, interposedbetween the cross-head A and the threepronged piece 0, as and for thepurpose described.

at. The notched bar F, jointed to the threepronged piece 0 and combinedwith the same, the spring B, and the cross-head A, substantially as andfor the purpose described.

WILLIAM R. MANIERRE. HENRY B. PORTER.

Witnesses:

CALVIN J. STAMBAUGH, WILLIAM L. SULLIVAN.

